Adjustable shore



Dec. 6, 1927. 1,651,610

C. M. MARKHAM ADJUSTABLE SHORE Filed Dec. l5, 1924 Patented ec. 6, i927.

nirlx ist CHARLES, ivi...v MARKHAM, or rivnranaronis', INDIANA.

ADJUSTABLE SHORE.

Application filed December 15, 1924. Serial No. 755,867.

dinal relative'position of which may be adjustable, and which-may be held positively in adjusted position.

The accompanying drawing illustrates my inventionz' F'g. 1 is ,a perspective view of my adjustable-shore; Fig. 2 is an enlarged perspective view showing details ofthe sliding head'and locking mechanism, with the head in raised position; Fie. 3 is a perspective view-showing the method employed 'for raising the-inner of the two telescoping menibeis; Fig. 4 is a side elevation showing part of the outer of the two telescoping members broken away, and a sliding head'in its lowerA position; 'Fig' is av perspective view illustratingdetails ofthe sliding head and lock-- ing dogs; Fig. 6' isa plan view showing certainvdetails of construction; Figf? is a detail showing' the preferred construction ofthe base of the outer ofthe two telescoping' members; and Fig. 8 is a detail view showing the Ipreferred form'of the two locking dogs.

My adjustable shore comprises' :a lower tubular member preferably*formed of two Vopposed channels 10 held in spaced 'relation by a base plate 11, struts 12, and .aband12 of sheet vvmetal which passes around both channels '10. I Slidably lmounted on the top. of ,the lower-'member is a head 13 pivotally supporting two dogs 14E which are adapted Ato engage frand rhold in adjusted position the member `15 which extends into the lower part of t-he shore formed by lthe channels '10..

` Slidable'transversely ofthe column .between the V'head 18'and the band 12 are two keys- 16. r'lhevupper surface of each key16 is provided with teeth 17 complementary tofteeth 18on Vthe lower side'ofthe head 13.- The keys 1 6 are providedfat their ends Awith downturned fingers 19 which serve :as stops .to limit the sliding movement of such'keys. The fingers 19 on each key are spacedsov as to limit the slidingmovement ofthe keys between the position shown in Figs.. 1 and 2 each other and the position shown` in Fig. t with the teeth17 fitting in thepspaces between the teeth V18. As a guide for each slidingv key 16 I provide alplate '2O spaced l from Athe flanges of the channels 10 to yprovi'defa guideway vin which each key lfiiiay slide. Conveniently, each plate 20' is pro- .with the teeth 17 vand 18-'abutting against l vided with an in-turned ii'nger 2l :engaging a slot in the key16. f This finger serves to reltain the key 16 init-s guideway andmay also serve as a stop to liinitthe'slidingmovement of such key. Slidablymonntedon the side of the head 13 is a plate v22, the -endsof which are `preferably bent-around the adjacent sides of the head 18. .These iin-turned ends serve as guides forthe sliding plate "22, assisting inl thisjrespect theshoulderedV rivets 23 passing through slots 211 in the plate '22; On thev top surface of eachkey 16 there. is

provided 'a shoulder for (io-operation with the sliding Aplate 22. This shoulder may Aconveniently be ones'ideof the end vtooth 17.

l/Vith the l"keys 16' in the position farthest to j-- the right vas shown in Fig. 2,5the'j sliding plate l22 engages Y the shoulders on vthe keys: 16j and prevents' movement of such keys tothe left`.

llfith Vthe lkeys in their right-hand position as shown in Fig; 2, the teeth'17 abut-against the teeth 18 and maintain thesliding head 13 in raised position.l When itjis desired v after to become evident the sliding plate -22 toslower the headf13 'fora purpose hereinis raised aiid'fthe keyslb moved-to the left where vtheteeth 1T will iitfin the spaces b etweentlie 'teethl when the'headislowered.

vThe dogsV 1a carriedV by the/ head -13 fare rouglilyfL-shaped in cross section.' Each dog '1st' is provided on yits opposite 'ends withr two alined bosses 30'. which are receivedin i holes31 jin the' members forming the sides of the 4Vhead 13. /Vhile vthese'bosses 3 0 could Vserve as pivotal supports to thev'dogs 14,1'

lili) prefer to use theinonly to prevent the dogs from accidentally comingout Vof `vthehead 13; and to "this e'nd,"Iv make'thebos'ses `30 l' considerably' vsmaller in .diameter than the vvholes 3 1 which receivethem;j` By this .con-

struction,.it is .notfnecessjary that the thrust eXerted'on the dogs bythe telescoping'gmember 15 be 'transmitted to thevheadjB through i these `comparz iti'vely short, bosses, ,but the lowerends" of the-dogs 1 4; may rest i'n'fav corneiv formed the vertical" wall 32A andthe l `i Y shape of a logarithmic spiral in order that head.

Li l) the :torce exerted on the dogs by the member will always approximate in direction to the lines A--B ot F ig. 8 irrespective o1' the thickness of the timber. By so shaping the working faces of the dogs 14, they will grip and hold effectively beamsot varying sizes. The means I employ for adjusting the relativeY longitudinal position Yof the inner and outer telescoping members is illustrated inV Fig. 3 and comprises a U-sha'ped jaw 40,.'

adapted to straddle the member 15, and connected by a link 41 `to a raising lever 42, the Vend of which is conveniently downturned to engage the lip 43 on the head 13. As the outer end of the lever 42 is raised, the member 15 is raised and is held in raised position` by means of the dogs 14. Vhen the outer end of the lever 42 is lowered, the jaw 4() drops and when the lever 42- is again raisedV the ymember 15 is gripped by the jaw and raised again. f Y

`lnusing my shore, the head 13 is raised and held in raised position by moving the keys 16 to the position shown in Fig. 2 where their teeth 17 abut against teeth 18 of the The sliding plate 22 dropsl behind the shoulders on the keys 16 and prevents accidental displacement Aof such keys. The memberl isthenraised by means of the raising lever Vi12in the mannery above described against the object which itis desired to support. The. dogs 14 serve to hold the member is placeV against the object supported. When it is desired to remove the shore, the plateV 22 is lifted andlthe keys 16 moved to the' position in which the teeth17 enterthe spacesbetween the teeth 18) whereupon the head 13 and the member 15 drop a `slight distance varying withthe depth Vot the teeth 17.v This vlowering of. theV head permits the slight rise of the member 15 which is necessary to disengage the dogs 14. 1

l With the head lowered, the dogs 14 may be disengaged and the member 15 allowed to drop into the'tubular support formed by the channels 10.V j

To further increase theadaptability of my shore I preferablyprovide vin the base plate V11:'one or more holes 11. Should it be desired Vto use myshore in a horizontaler inclined position, the holes 11 may be con- 1. An adjustable shore, comprising a hollow base, a rectangular member longitudii nally slidable in said base, a head longitudi nally adjustable on said base, means carried by said head for locking said member and saidhead in fixed relative position, land a key operating between said headl and an abutment on said base and movable laterally ot' said base to adjust the longitudinal position of said head. l

2. An adjustable shore, comprising a base` a member longitudinally slidable in said base, a head longitudinally adjustable on said base, means carried by said head for locking said member and said head in fixed relative position, a key operating between said head and an abutment on said base and movable to adjust the longitudinal position ot said head, and means 'for holding said ke in iixed position. l 1

3. An adjustable shore, comprising a base, a member longitudinally slidable in said base, a head longitudinally adjustable on said base7 means carried by said head for locking said member and said head in fixed relative position, a key operating between said head and an abutment onsaid base and `movable to adjust the longitudinal position ot said head, said key having a shoulder, and a sliding plate mounted on said head and adapted to engage said shoulder to prevent accidental displacement of said key. Y

4. A n adjustable shore, comprising a base, al member longitudinally slidable in said base and means for. holding said member and base in adjusted position, said means including dog and a supportrthereor,

said support being mounted on said ibase,

and said dogv having a curved face adapted lto engage said slidable member and also having opposite said curved tace a face adapted to bear against said support and. to transmit toV said support. the force exerted on said dog by said slidableY member. j y

5. An adjustableshore, comprisingr a hollow base formed `of two opposed channel lll) claim 4 with the addition. that-said dogis provided with two coaxial bosses and said Y 4 with the additionthat said dog is providedv withl two coaxial-bosses andsaid support is provided withv a hole for the reception of each or said bosses, said holes4v being 01": ma-

terially larger diameter than said bosses;

8. An adjustable shore, comprising a holloW base formed of tWo opposed Channel members, a rectangular member longitudinally slidable in said base, a head longitudinallyv adjustable on said base, means carried by said head for locking said member and said head in fixed relative position, and

Vtion of said head.

` InVWitness whereof, I. have hereunto set my hand at Indianapolis, Indiana, this 2d day of December, A. D. one thousand. nine hundred and twenty-four.

CHARLES M. MARKHAM. 

